Shedding light on dark DNA Most textbook definitions of evolution state that it occurs in two stages: mutation followed by natural selection. DNA mutation is a common and continuous process, and occurs completely at random.
The average adult only eats 15 grams of fiber per day. Women need 25 grams of fiber per day, and men need 38 grams per day, according to the Institute of Medicine.
Women should consume about 25 grams of fiber per day and men should consume 38 grams. The majority of Americans get less than half the daily recommended amount of fiber. Naturally occurring fiber is generally your best bet.